Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie a maneira de partida para a data da vaga 25 de agosto de 2008.
 ###Tabelas: CREATE TABLE official_delegates (official_delegates_id AUTO_INCREMENT PRIMARY KEY, Represent VARCHAR, Contestant VARCHAR, Age INT, Height (ft.) VARCHAR, Height (mtr.) VARCHAR, Hometown VARCHAR) CREATE TABLE geography_and_environment (geography_and_environment_id AUTO_INCREMENT PRIMARY KEY, Island VARCHAR, Nickname VARCHAR, Area VARCHAR, Population (as of 2010) INT, Highest point VARCHAR, Elevation VARCHAR, Age ( Ma ) VARCHAR) CREATE TABLE eastern_conference_quarter-finals:_vs._8 (eastern_conference_quarter-finals:_vs._8_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Visitor VARCHAR, Score VARCHAR, Home VARCHAR, Decision VARCHAR, Attendance INT, Series VARCHAR) CREATE TABLE managerial_changes (managerial_changes_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Replaced by VARCHAR, Date of appointment VARCHAR, Position in table VARCHAR) CREATE TABLE frequency_specifications (frequency_specifications_id AUTO_INCREMENT PRIMARY KEY, HyperTransport version INT, Year INT, Max. HT frequency VARCHAR, Max. link width VARCHAR, Max. aggregate bandwidth (bi-directional) VARCHAR, Max. bandwidth at 16-bit unidirectional VARCHAR, Max. bandwidth at 32-bit unidirectional* VARCHAR)  
SELECT Manner of departure FROM managerial_changes WHERE Date of vacancy = 25 August 2008